The use of serum separator tubes (SST) is not acceptable. Submission of an SST will result in cancellation.

TEST DETAILS

Reference interval:

Accompanies report.

CPT code(s):

80342

Note: The billing party has sole responsibility
for CPT coding. Any questions regarding coding should be directed
to the payer being billed. The CPT codes provided by GML are
based on AMA guidelines and are for informational purposes only.

Test includes:

Risperidone.

Methodology:

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Synonyms:

RISPERIDAL

Quest test code 14365

Clinical significance:

Therapeutic drug monitoring for effective therapy. Risperidone is rapidly converted into its hydroxy metabolite in the liver. Peak concentration of risperidone occurs in about 1 hour following oral administration and for 9-hydroxyrisperidone the peak level is reached at 3 hours (17 hours for poor metabolizers). The elimination half-life of risperidone is 3 hours (20 hours for poor metabolizers), and is 21 hours of hydroxyrisperidone (30 hours for poor metabolizers).